{"instruction": "You are an expert in relationship extraction. Please extract relationship triples that match the schema definition from the input. Return an empty list for relationships that do not exist. Please respond in the format of a JSON string.", "schema": ["founded", "country of headquarters", "members", "country of birth"], "input": "A union representing workers at Olympic Airlines said Tuesday it opposes the prospect of  Qatar Airways  buying  Greece  's troubled state-owned carrier ."}
{"founded": [], "country of headquarters": [{"subject": "Qatar Airways", "object": "Greece"}], "members": [], "country of birth": []}